How Much Weight Can You Lose With Semaglutide — and What Does It Actually Cost?

Step 1, understand what semaglutide results actually look like before pricing anything

The STEP 1 trial, published in the New England Journal of Medicine, randomised over 1,900 adults without diabetes to semaglutide 2.4mg or placebo for 68 weeks. The semaglutide group lost an average of around 15% of body weight; the placebo group lost roughly 2.4%. Those numbers are meaningful, but they're averages, some participants lost considerably more, others less. Results track closely with how consistently treatment is taken and whether lifestyle changes run alongside it.

A higher-dose option now exists. The MHRA approved a dedicated 7.2mg single-dose Wegovy pen in April 2026, with trial data showing an average of approximately 20.7% weight loss at 72 weeks at that dose, closing the gap with tirzepatide considerably. You can read more about the evidence across dose levels on our expected weight-loss outcomes page. If you're curious about how much weight you can lose on semaglutide at different stages of treatment, our dedicated page breaks down what the clinical evidence shows across the full dose range. The point here is that how much weight you lose on semaglutide is not a single fixed number; it is a range shaped by your individual response.

None of this tells you whether semaglutide is right for you specifically, that determination belongs with the prescriber. But knowing the realistic range helps you evaluate whether the cost is proportionate to the potential benefit.

Step 2, get a clear picture of how UK private pricing is structured

UK private weight-loss treatment is typically priced per pen or per month, and the figure moves considerably depending on the dose and the provider. Eli Lilly raised Mounjaro's list price from around £122 to around £330 per four-week pen from September 2025, which pushed private market prices upward across both tirzepatide and semaglutide products as providers recalibrated. Typical private semaglutide pricing since then runs roughly in the £149–£375 per month range by dose and provider, as widely reported; individual quotes vary.

What's important to understand is what a headline monthly price often does and doesn't include. Some providers quote the pen price alone, with consultation fees, prescription charges, delivery costs and dose-review support billed separately. That means two quotes that look similar on paper can represent very different total costs over a treatment course. Our Wegovy pricing page walks through exactly what's included at nume, so you can compare like with like. The licensed eligibility criteria (broadly, a BMI of 30 or above, or 27 or above alongside a weight-related health condition) and a full clinical assessment come before any price discussion is meaningful. NICE's guidance on semaglutide (TA875) sets out the clinical picture clearly.

Worth knowing: lower BMI thresholds apply for some ethnic backgrounds under UK guidance, which your prescriber takes into account during assessment.

Step 3, see what one transparent price actually covers

nume's approach is to include everything in one price: the consultation, the prescription, the treatment and free next-working-day delivery. No subscription renews automatically in the background, and no repeat order goes out without a clinical re-review first. If you order before 12pm on a weekday, your prescription is reviewed the same day and (once approved) dispatched the same afternoon, arriving via tracked DPD the next working day in plain, unbranded packaging.

We are not the cheapest option in the market, and that's deliberate. A lower headline price somewhere else is usually lower because something has been stripped out: the clinical review, the aftercare, or the assurance about the supply chain. Our prescribers are GPhC-registered Independent Prescribers; you can verify our pharmacy at the GPhC register, premises number 9012878. For anyone wondering whether there's a way to get semaglutide cheaper through vouchers or discount codes, the short answer is no, nume runs none, and if an unverified seller is offering a POM like this with a promotional code attached, that is a red flag worth taking seriously. You can find more context on pricing expectations on our page about what 'cheap Wegovy' really means.

Step 4, ask the right question before committing to any provider

For a prescription medicine, price is the wrong measure to lead with. The MHRA has warned publicly about counterfeit weight-loss pens sold online, fake pens have in some cases contained insulin rather than the medicine on the label, and large seizures of illegally traded products have taken place across the UK. The safe route is always a pharmacy you can check on the GPhC register, dispensing a genuine prescription from a qualified prescriber. Suspect products or sellers can be reported via the MHRA Yellow Card scheme.

The better questions are: is this pharmacy regulated and verifiable? Is there a real clinical assessment before anything is prescribed? Is aftercare available if my response to treatment changes? If the answer to any of those is unclear, the price doesn't matter, the risk isn't worth it. Semaglutide can produce meaningful weight loss for the right person under proper clinical supervision, and our pages on how much weight you can lose with semaglutide injections and how much you can lose on semaglutide overall give a fuller picture of realistic outcomes to help set expectations before you commit. Getting that supervision right is where the value sits, not in shaving a few pounds off the monthly bill. Read about the full treatment pathway on our Wegovy overview page, or explore how semaglutide compares with other weight-management options.